Google Talk Pro is a nice extension for Google Chrome which allows users to chat with their friends in Google talk right inside the browser. The extension has all the features of Google talk gadget and allows users to pop up the talk gadget from Chrome. The extension allows you to perform all the tasks of default Google Talk with support for adding friends, contacts etc without the need for the desktop application. You just need to sign in to the talk using the Google ID.
The extension comes useful when you cannot install the desktop client on the PC. This extension also enables you to set the status as invisible just like the email chat client, a feature missing in the desktop version of Google Talk.
Google Talk Pro brings in some nice features and you can also Gmail quickly from the link available.